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Atoms, Elements, Compounds

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A series of free Science Lessons for 7th Grade and 8th Grade, KS3 and Checkpoint Science in preparation for GCSE and IGCSE Science.

Atoms, Elements, Molecules, Compounds
• All matter is made of particles called atoms.
• An element has only one type of atom.
• Each element has its own name and symbol.
• Atoms can join together to form molecules.
• Elements can combine in a chemical reaction and form a compound.



First 20 elements in the Periodic Table
Names and Symbols
Hydrogen - H
Helium - He
Lithium - Li
Beryllium - Be
Boron - B
Carbon - C
Nitrogen - N
Oxygen - O
Fluorine - F
Neon - Ne
Sodium - Na
Magnesium - Mg
Aluminum (or Aluminium) - Al
Silicon - Si
Phosphorus - P
Sulfur - S
Chlorine - Cl
Argon - Ar
Potassium - K
Calcium - Ca

A song to help you remember the first 20 elements

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
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